Sheet-delivery apparatus for printing-presses



SEEET DELIVERY APPARATUS PoR PRINTING PRESSES. No. 413.814.

Patented 001;. 29, 1889.

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Patented Oct." Z9, 1889.

WSCOTT. SHEET DELIVERY APPARATUS POR PRINTING PRESSES. 1\r0.41z 814.`

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W. SCOTT. SHEET DELIVERY APPARATUS POR PRINTING PRESSES.

N0.41s,814. Patented ont. '29,' 1889.

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v 4 Sheets-Sheet 4. W. SCOTT. SHEETv DELIVERY APPARATUS POR PRINTINGPRESSES. N0. 413.814.V

Patented Oot.. 29.1889.

VSTATI-:S4 PATENT OFFICE.

- VALTER SCOTT, OF PLAINFIELD, NEW JERSEY.

SHEET-DELIVERY PPARTUS FOR PRINTING-PRESSES.

SPECFICATIONforming part of Letters Patent No. 413,814, dated October29,1889.

Application liled March '7, 1889. Serial No. 302,239. (No model.)

Jersey, have invented an Improvement in Sheet-Delivery Apparatus forPrinting- `Presses, of which the following is a specification.

In my patent, No. 351,117 1, granted October- 26, 1886, and in mypatent, No. 400,875, granted April 2, 1889, I have represented agripperbar that carries grippers for seizing the sheet as it is passedaway from the printing mechanism, and this gripper-bar and grippers aremoved along horizontally over a table upon which the printed sheets arelaid, and the grippers are opened .at the proper time for dropping thesheetgrbut in this instance the grippers are sometimes liable to catchthe end of the sheet upon the return movement, because the air beneaththe sheet partially holds up the same.

The object of the present invention is to raise the points of thegrippers after they have been opened to drop "the sheet, so that suchgrippers do not return in the same path in which they move in conveyingaway the sheet, but above such path, and the advancing end of the sheetas it is dropped by the grippers may be partially pressed down by suchgrippers during the movement given to such grippers, and I provide forguiding the advancing end of the sheet into the grippers, so that suchgrippers do not have to be opened as wide as usual. The table upon whichthe sheets are delivered is--adjustable and movable, so that the samemay be adapted to the sheets as they are carried olii` horizontally bythe grippers, for incases when the sheet is heavy itis apt to hang downtoo far, and when light it does not rest -down upon the pile of sheetsevenly if it has too far to fall.

In the drawings, Figure 1 is an elevation representing a portion of theprinting mechanism and showing the sheet-delivery device. Fig. 2 is aplan view of the same, representing the position of the respectivepart-s. Fig. 3 is a section, in larger size, of the gripper-bar and itsholding devices. Fig. fi is a planof the same at one side of the press.Fig. 5 is4 an elevation of the gear at the end of the gripper-shaft.Fig. 6 is a plan view of the Fig. 8

same, and I have represented the impressioncylinder D as above thetype-bed B, which latter reciprocates beneath the impressioncylinder asthe printing is performed. The cross-bar N is parallel with the axis ofthe impression-cylinder D, and it is reciprocated horizontally by anysuitable means-such, for instance, as by rack-bars, as in said PatentNo. 351,471, or by screws that are revolved as in my aforesaidapplication. I

have represented the screws r3 as supported in stationary bearings andrevolved first in one direction and then the other by the toothedsegment T3, and bevel-gearing` U and U andto this toothed segment T3 aswinging movement is given by the connection T2 to a crank-pin on theWheel S3, which wheel is re- `volved once for each sheet that isprinted.

Thereby the screws r3 are revolved iirst in one direction and then inthe other and give to the nuts r4 a movement from end to end of thescrews, or nearly so, the movement being greater than the length of thesheet, Vso as to draw the sheet along over' the table M and leave suchsheet thereon by opening the grippers at the proper time.

The cross-bar N is provided with grippers 6 and 7, and instead of saidgrippers ,simply being opened at the proper time the cross-bar N ismoved to cause the grippers to return in a different plane and out ofthe way of the paper. With this object in view I either raise and lowerthe grippers or give tothe cross-bar N a rotation in the nuts r4, whichnuts form bearings or journal-boxes. It is preferable to employa disk 19or crank-arms 20, keyed on the cross-bar N, so as to revolve Withfthesaid bar N, and the movable grippers 7 are upon the cross-shaft 21,which crossshaft 21 is supported atits ends in the disk 19 or crank-arms20, and there is a suitable spring (shown as a helix) 58 around theshaft-.

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21 for closing the grippers 7 against the grippers, and at one end ofsuch cross-shaft 2l there is a device for holding the grippers open-suchas the catch 22, that is received by the spring-latch 23, so that thegrippers are held open thereby during their return movement.' Thegrippers and catch are acted upon by the cam-arm 59 coming against thestationary stud 2-1 at the extreme distant end of the movement given tothe cross-bar N, so as to open the grippers for dropping the sheet., andthe latch prevents such gri ppers closing until the latch 23 comes incontact with the stationary stud 25 'to nnlatch the arm 22 and allow thegrippers to close in seizing the sheet.

The cross-bar N, disks 19, and crank-arms 20, the arm 22, and thespring-latch 23 all being supported by the cross-bar N, such crossbar Ncan be raised and lowered or rotated or partially rotated and carry withit the parts named without changing the condition of the grippers whenthey are either open or closed, and it is now to be understood that whenthe grippers have seized the sheet and moved the same along over the bedM the grippers are opened as the cross-bar N is stopped at this end ofthe movement and the sheet can fall away from such grippers; but inorder to prevent the grippers from catching the end of the sheet. duringtheir return for another sheet I raise such grippers or give them apartial or complete rotary movement to carry the points of the grippersaway from the sheet to clear the end of such sheet as they are raised upabove the position that the sheet has occupied.

I remark that any suitable mechanism may be made use of for giving tothe cross-bar N the proper movement for the purpose aforesaid. I haveshown a stationary rack 30 at one side of the press and an interruptedgear 3l upon the cross-bar N. This interrupted gear, or the disk 19, isheld by a spring 32 and lever having a roller 50 upon it entering aslight recess in either the periphery or the side of such gear or thedisk, so as to apply the frictionnecessary to prevent the crossbar Nrevolving except when the gear 31 receives a positive movement from therack 30.

In order to bring the rack 30 into action upon the gear 31, the rackitself might be lifted by any suitable movement to cause its teeth tocome into contact with the gear 3l; but I prefer to make use of a springstartinglatch 33 upon the frame of the machine and aprojection St uponthe gear 31 or upon the disk 19, and as the cross-bar N and partsconnected therewith are drawn along by the action of the screws r3 ortheir equivalents the projection 34: slides over and depresses thestarting-latch 33, and such latch then springs up and holdstheprojection 31. During this movement the portion of the gear 31 wherethere are no teeth has been adjacent to the rack 30, and as the nuts r4and cross-bar N are -moved in the opposite direction and toward theimpression-eylinder D, the projection 3i being detained by the latch 33,the gear 31 is partially turned, so as to bring its teeth into gear withthe rack 30; hence there is a complete or partial rotation of thecrossbar N at the commencement of the return movement of the nuts r4,and in this movement the points of the grippers 6 and 7 are carriedbackwardly and raised to clear the end of the sheet that has beendropped by the opening of such grippers, so that such sheet cannot beinjured by the grippers onY cess to steady and hold the parts in theirproper position as the next sheet is drawn along over the table M. If,however, the rack 80 is not sufficiently long to give a completerotation to the gear 31 and cross-bar N, the parts may be returned totheir normal position by the action of the spring 5l, coiled Yarou ndlthe cross-bar N, between the same and one of the nuts "114. This latterarrangement is indicated in Figs.V '7 and 8, wherein the rack 30 isrepresented as shorter and is adapted to receive a rising-and-fallingmovement at the proper time by any suitable means-such, for instance, asthe wedge 3G .beneath such rackbar, to which a motion is given at theproper time by a connection to any suitable portion of the bars. A stopGO and a projection 61 serve to prevent the bar N and grippers turningback too far.

In order to lessen the distance that the grippers have to be opened, andhence provide for as small a rising-and-falling movement as possible tothe crossbar and grippers, I provide guide-plates 52, Fig. 3, forming amouth through which the sheet passes to the place where such grippersare closed upon it. These guide-plates are at the ends lot the bars orlines of tapes that convey the sheet from the printing device to thegrippers.

I have shown in Fig. 9 the cross-bar N and grippers as held by arms 53,pivoted at 54C to the nuts r4, and having pins 55, that run upon cams5G, that lift the grippers as they are opened and drop the sheet, andthen the spring-switch 57, dropping, causes the grippers to return at ahigher elevation, thus clearing the sheet that has been dropped.

The delivery-table M is supported near its ends by the adjustable racksM set to slide vertically in supports on the frame of the machine, 4andthese racks are moved by pinions M2 upon cross-shatts m3, so as to raiseroo IOS

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ends of the racks M but to allow the table to be lifted off withfacility. At the other end the table is preferably provided with fiatplates resting upon the racks, so as to slide thereon when the other endof the table is raised or lowered.

I claim as my inventionl. The combination,withthegrippers'6 and 7 andthe cross-bar N and its end bearings, of

screws or their equivalents for reciprocating the bearings, thecross-bar and parts carried by the same, the table M, upon which thesheets areV delivered, a stop for opening the grippers, and mechanism:substantially as specified, for raising the grippers to clear them fromthe sheet laid .upon the table, substantially as set forth. Y

2. The combination, with the cross-bar N and screws r3 or theirequivalents. for reciprocating such cross-bar N, of the grippers 6 and7, the cross-shaft 21 for the grippers 7, a spring for closing thegrippers, an arm and catch for holding the grippers when open, and agear and rack for giving to the cross-bar N and parts connectedtherewith a rotary or partial rotary movement after th'e grippers havebeen opened for dropping the sheet, substantially as set forth.

8. The combination, with the cross-bar N, of bearings at the ends ofsuch cross-bar and screws or their equivalents for reciprocating thebearings and cross-bar, grippers carried by the cross-bar, a gear andrack for revolving or partially revolving the cross-bar N and grippers,and a roller and spring acting in a recess to steady the cross-bar andgrippers and prevent them revolving during the time that the sheet iscarried bythe grippers,sub stantially as set forth.

.4. The combination, with the cross-bar N and the bearings r4 andmechanism for reciprocating such bearings and carrying the cross-barlaterally above the sheet-delivery table, of the grippers 6, the shaft21, and grippers 7 the arm and catch 22, the spring-latch 23, forholding the grippers open, the interl rupted gear 31, the rack 30, thestarting-latch 33, and the projection 34, against which thestartinglatch operates to give to the interrupted gear a partialrevolution at the commencement of the return movement of the grippers,substantially as and for the purposes set forth.

5.-.The combination, with the grippers for conveying the sheet alongabove the delivery-table, of the stationary guide-plates between whichthe sheet is passed to the grippers, substantially as set forth.

6. The combination, with the reciprocating gripping mechanism forseizing and delivering sheets, of the delivery-table and an adjustablesupport near each end of the table for raising or lowering one or bothends and inclining the table, substantially as specified.

7. The combination, with the sheet-delivery table, of a support near oneend of the table, and a rack and pinion ,near the other end of the tableto raise or lower the same, substantially as set forth.

8. The combination, with the grippers and their cross-bar, of nuts forreceiving the ends of the cross-bar, screws for actuating such nuts, andgearing for revolving the screws iirst'in one direction and then theother and reciprocating the gripper-bar and parts connected therewith,substantially as set forth.

9. The combination, with the sheet-delivery table, the grippers, andcross-bar carrying the same, of supports for the ends of the cross-bar,screws or their equivalents occupying a fixed position for supportingand reciprocating the" cross-bar laterally above the table, and meansfor varying the position of the grippers in relation to their sup# portsand raising the grippers above the path of the sheet on the returnmovement of such grippers, substantially as1 set forth.

lO. Thecombination, with the grippers and the cross-bar carrying thesame, of a gearwheel and rack for rotating or partially rotating thecross-bar and moving the grippers away from the sheet after the grippershave been opened, substantially as set forth.

11. The combination, with the cross-bar and its end bearings, ofthescrews or their equivalents for reciprocating the same laterally,grippers connected with and carried bythe said cross-bar, and mechanism,sub-v WALTER SCOTT. VVitn esses:

GEO. T. PINCKNEY, HAROLD SERRELL.

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